Front loading syringe



Jan.'30, 1945. A. E. SMITH FRONT LOADING SYRINGE Filed June 23, 1944 v2 Sheets-Sheet 1 INVENTOR. I ARTH R 5 SMITH Af'korncy Jan. 30, 1945. A. E. SMITH 2,368,432

FRONT LOADING SYRINGE Filed June 23, 1944 2 Sheets-Shet 2 K v II-VVENTOR. BY ARTHUR E SM/TH 4.9 AH'oi-ney Patented Jan. 30, 1945 -zgessnaz .FRON'ILLOADING SYBINGE. Arthur Smith, Los'Angeles; Galif. ia licationqmnelzs, 1944;: seriai No...541;684

' -KClaims. (o1. res ns)" This invention-relatesto:aasyringe device.

- The. general: iobject f. :the. inventioniistmprcvide a novel front loading, ampule type syringe A::more specific object-0t .the inventiongisrto provide .a syringe=1 of the :ampule i-zholding type .1 wherein-hovel meansds.v provided forse'curingaan ampuleiimthe syringe barrel.

*Another' object of; the -.inv.ention -.-is1to :provide :a

novel iiront :zmEmbEl for :ian vampule .vholdiug syringe. Y

:Other: objects and the advantages-oi the inventionwill beiapparent fromithe followingidescrip j tion. takeninconnection. awith' theaccompanying drawings,;-wherein:

. Fig. 1* rise; central,- sectional view;=with :partslin .-Eig: .6 iisia fragmentary. front view ofithmsyringe barrel; I

Fig. 7, .is *ayiew-".simi lar.-to-t Eig. 1,-.showing.1a modification; f i Fig. 815 a central sectionalsyiew showing :the

is Qto :be; placed in solution in aliquid :vehicle in the ampule 11 dustpriorto.use..so'-that afresh solution. maybe provided.

i-Thefrontend :of the :barrelv 1 I: is provided. with a thickened portion 24 which is threaded zas at 25. .Theportion. 24 includes .-a longitudinally extending slot 26ain-which .-.a.-dog $2! is pivotally mounted nna pinZ-B. Asprin'g 29 normally urges thfidQgi to. the position shown in Figs. 1 and -5.

.z-In usera-nv ampuleisz-inserted in thefront endof the-barrel e show-n in. Fig. :2 a and moved ,inwardly debressing the dogu until the ampule end-clears the dog, whereuponthe latter.- will move to, the positioneshown. in.-

. :1. When inthis position,movementof .the louteri end 29' of the dog: will .cause the. ampule to .be; released, wh'ere uponv itsw-ill. be urgedoutwa'rdly. from. the.- .barrel by means of :the-action of; the sleeve 14 .and'spring 1:5.42Thusitisunnecessarmto remove the ampule fromthebarrel (by. hand. 7 I r I I ,Therorwardend.ofthe syringelisprovided with a-ifrontrmember MW-hioh threadedlyengages the threadsbni the barreltld. Thismember30 isprovidedwvith .-a :tube-3l which. is shown. as-having a closed end. 3 2 and one orlmorellateral apertures 33 bye-means .-.of which' oommunication is established between the interior -andexterior of the plug-member which serves to hold-:thewneedle'zin place;

..Fig. :9 .is it. .central, sectional=- view,-:-par.tl-y r-in elevation showing, the .ampule .openinganember; and needle,and v r I 1 Fig. 1-03is a central, sectional. view; showing [the front member; y H

. Referring tothe .drawingsiby referenceicharam 'ters,-.I :have :shown my invention as embodiedsin a :syringewvhich .-is indicated .-generally.-.atslill. ;As shown the syringe includesial barrelal lziinswhich-a plunger 12 .is reciprocateduby meansof ea-finger engagingrmember I 3. About the .plun-ger I: arrangea sleeve I4 which isrnormally urgedtinwardlyr-in .the, barrel by a. spring .4 5.- ,T-heplunger :has a headlfi which-is oi.- asizet fitwithin-an- .ampule- -I 1 Awhile; the sleeve His-is -of asizerto. engage -.the..end-of-zthe--ampule ;l l.

.-.The. ampu-le maybe made of any suitable .;ma-

terial,.,such::as; glass or' plastic, .and is provided with an..upper.corkl-8 whiohis in theanaturesof a. piston @and with .a lower cork l9 which; hasn-a cavity. 2U :olosed by-ea .displaceable -plug -21. .tIn thev cavity. 20 I-. arrange a medicinal ..-preparation 22. .The-iront end of .the =cork-l 9 islpreferably provided with a. recess- 23. I 1

The corks and -disc-.2.l .may be made fr'a g0Od gradexofrubberor similar material and the preparation 22 may be a drug such as Novocaine which tube. QT'he-tube .31 is arranged. in the member 30.:coaxialwith a-boreu34 in the member. 30 .and

in.-this-.'bore.-I -fittheinner end..35,of a .tubeand v ahypodermio needle. which has a sealing ball I36 thereon. and. which engages .a. tip .which has .a

flange 38. which engages the-extreme end 39 .of the frontv members-3B .to holdl the .parts assembled.

In use the ampule .is inserted .asshown .in Fig.2

and .is moved. inwardly. until .itassumes th'e positionshown-in. Figal. Thereupon. the member 3ll is [moved -into. .place andeas itldo'es so .theend fl v of utheatube enters theslot23-and pierces the f diaphragm Einadvance of theslotn and causes the. disc] I .to be unseated, thus' discharging (the medicinalupreparation. 22..into-fth e .ampule. The membermt lsmay .be.mo.unted on the .member 30 eithenbetore :orafter the latterv is p1aced. on the barrel I 1. 1 1

in Jiligs. 7 to..10,;-inclusive, the barrel and ampule .a're thewsame ..as .previously described .but

the Lfront member. 4.! is different in that vit in-.

chides v.an internally ethreaded ..collar 42 which receives .a v--thr eaded plug 143 which .has' a bore MHtherein. LThe ,.bore lflrreceives .a .tube 45 similar. to the .tubeLS'I previously. described. :This

tubeissecuredto.Llthenbper end i 45 of a needle 4! with a sealing ball 48' arranged at the juncture .of,the.tube..-and needle. .In .usethe needle This .insertedthrough .abore 49 '.inlthe...front member 41 .andthe member is thenwsecured in place. IT-hereafter theassembly .is..moun;ted upon thesyringe barrel :as. .shownin. Fig. -7.

.IQFronhthe foregoing description. .it -will beapparent that I have inventeda novel front loader therein, a dog movably mounted on said barrel and including a portion adapted to engage an ampule in the barrel, said dog being shiftable 1 j to release an ampule in the barrel, and a front member mounted on said barrel.

2. A syringe, including a barrel having a plunger therein, means to urge the plunger forward in the barrel, means on the plunger adapted to engage an ampule in the barrel, a front member, 7

coasting means on the front member and barrel for releasably mounting the front member on said barrel, said front member having an inwardly projecting fluid conducting member mounted thereon adapted to communicate with theinterior of an ampule in the barrel.

3. A syringe, including a barrel, an ampule in said barrel, said ampule having a cork at the front end, said cork having an inwardly opening cavity with a medicinal preparation therein, a shiftable closure closing the inner end of said cavity, a dog movably mounted on said barrel and including a portion adapted to engage an ampule in the barrel, a front member mounted on said barrel, said front member having an inwardly projecting tube thereon communicating with the interior of the ampule and a needle communicating with the interior of the tube.

4. A syringe, including a barrel having a plunger therein, a sleeve slidable on the plunger and adapted to advance to engage an ampule in the barrel, resilient means normally holding the sleeve in advanced position, a dog pivotally mounted on the forward end of said barrel and including an inner end portion adapted to engage and hold an ampule in the barrel, said dog having a portion projecting beyond the forward end of the barrel for engagement by an operator to shift the dog to release an ampule in the barrel, resilient means normally urging the dog to ampule engaging position, a front member mounted on said barrel, said front member having an inwardly projecting tube thereon adapted rear end and having a second cork at the front end, said second cork having an inwardly opening cavitywith a medicinal preparation therein,

a shiftable closure closing the inner end of said cavity, said barrel having a slot therein, a dog pivotally mounted in said slot and including an inner end portion adapted to engage and hold 1 an ampule in the barrel, said dog having a portion projecting beyond the forward end of the barrel for engagement by an operator to shift the dog to release an ampule in the barrel, resilient means normally urging the dog to ampule engaging position, a front member mounted on said barrel, said front member having to communicate with an ampule in the barrel and a needle on the front member and com- .municating with the interior of the tube.

5. A syringe, including a barrel, an ampule in said barrel, said ampule having a piston cork at the rear end and having a second cork at the front end, said second cork having an inwardly opening cavity with a medicinal preparation therein, a shiftable closure closing the inner end of said cavity, a dog pivotally mounted on said barrel and including an inner end portion adapted to engage and hold an ampule in the barrel, said dog having a portion projecting beyond the forward end of the barrel for engagement by an operator to shift the dog to release an ampule in the barrel, resilient means normally urging the dog to ampule engagingposition, a front an inwardly projecting tube thereon communieating with the interior of the ampule and a needle communicating with the interior of the tube.

a 7. A syringe, including a barrel having a plunger therein, a sleeve slidable on the plunger and adapted to engage an ampule in the barrel, resilient means normally holding thesleeve to ampule engaging position, an ampule in said barrel, said ampule having a piston cork at the rear end and having a second cork at the front end, said second cork having an inwardly opening cavity with a medicinal preparation therein, a shiftable closure closing the inner end of said cavity, said barrel having a thickened forward end and having a longitudinally extending slot in the thickened portion, a dog pivotally mounted in said slot and including an inner end portion adapted to engage and hold an ampule in the barrel, said dog having a portion projecting beyond the forward end of the barrel for engagement by an operator to shift the dog to release an ampule in the'barrel, resilient means normally urging the dog to ampule engaging position, a front member mounted on said barrel, said front member having an inwardly projecting tube thereon and having a bore communicating with the interior of said tube, said tube having an aperture affording communication between the interior and exterior thereof, and a needle mounted on the front member and extending into the front member bore and communicating with the interior of the tube.

8. A syringe, including a barrel having a plunger therein, a sleeve slidable on the plunger and adapted'to engage an ampule in the barrel, resilient means normally holding the sleeve in ampule engaging position, an ampule in said barrel, said ampule having a piston cork at the rear end and having a second cork at the front end, said second cork having an inwardly opening cavity with a medicinal preparation therein, a shiftable closure closing the inner end of said cavity, said barrel having a thickened forward end and having a longitudinally extending slot in the thickened portion, a dog pivotally mounted in said slot and including an inner end portion adapted to engage and hold an ampule in the barrel, said dog having a portion projecting beyond the forward end of the barrel for engagement by an operator to shift the dog to release an ampule in the barrel, resilient means normally urging the dog to ampule engaging position, a front member mounted on said barrel, a tube, means to hold the tube on the front member, said tube projecting into the barrel, said tube having an aperture affording communication between the interior and exterior thereof, and a needle on the front member and communicating with the interior of the tube.

ARTHUR E. SMITH. 

